Out-of-vehicle notification device

ABSTRACT

An out-of-vehicle notification device notifies a moving person in a vicinity of a host vehicle of information related to a behavior of the host vehicle while the host vehicle is being automatically driven. The out-of-vehicle notification device includes a moving person detecting unit configured to detect the moving person who is to be notified, an approaching vehicle detecting unit configured to detect an approaching vehicle approaching the moving person to be notified, a notification unit configured to perform notification of information with respect to an outside of the host vehicle, and a notification control unit configured to cause the notification unit to perform notification of vehicle stoppage information, which indicates that the host vehicle will be decelerated, when the moving person to be notified is detected and a traveling plan is a traveling plan in which the host vehicle is decelerated.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of priority from Japanese PatentApplication No. 2018-089832, filed on May 8, 2018, the entire contentsof which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to an out-of-vehicle notification devicethat performs notification with respect to the outside of a vehicle.

BACKGROUND

A device that provides information related to traveling of a hostvehicle to a nearby pedestrian from the host vehicle while the hostvehicle is being automatically driven is described in specification ofUK Unexamined Patent Publication No. 2531084. The device providesinformation or the like on whether to make way for the pedestrian or notto the pedestrian using light, voice, or the like, for example.Accordingly, the pedestrian can act according to the notification.

SUMMARY

The device described in specification of UK Unexamined PatentPublication No. 2531084 notifies the pedestrian of information relatedto the behavior of the host vehicle but the device does not performnotification in consideration of the behavior of another vehicle.Therefore, the other vehicle may approach the pedestrian who starts tomove according to the notification performed by the device whichindicates an intention to make way for the pedestrian. Accordingly, inthis technical field, it is desired to perform appropriate notificationof information related to the behavior of a host vehicle inconsideration of the presence of another vehicle.

An out-of-vehicle notification device according to an aspect of thepresent disclosure is an out-of-vehicle notification device whichnotifies a moving person in a vicinity of a host vehicle of informationrelated to a behavior of the host vehicle based on a traveling plan ofautomatic driving while the host vehicle is being automatically driven.The out-of-vehicle notification device includes an outside situationdetecting unit configured to detect a situation in the vicinity of thehost vehicle, a moving person detecting unit configured to detect themoving person who is to be notified of the information related to thebehavior of the host vehicle based on a result of detection performed bythe outside situation detecting unit, an approaching vehicle detectingunit configured to detect an approaching vehicle approaching the movingperson to be notified who is detected by the moving person detectingunit based on the result of detection performed by the outside situationdetecting unit, a notification unit configured to perform notificationof information with respect to an outside of the host vehicle, and anotification control unit configured to cause the notification unit toperform notification of vehicle stoppage information, which indicatesthat the host vehicle will be decelerated or stopped or indicates thatthe host vehicle is being decelerated or stopped, with respect to themoving person to be notified when the moving person to be notified isdetected by the moving person detecting unit and the traveling plan is atraveling plan in which the host vehicle is decelerated or stopped. Thenotification control unit is configured not to cause the notificationunit to perform the notification of the vehicle stoppage informationwhen the approaching vehicle is detected by the approaching vehicledetecting unit.

When the approaching vehicle approaching the moving person to benotified is not detected, the out-of-vehicle notification deviceperforms notification of the vehicle stoppage information with respectto the moving person to be notified. Accordingly, the moving personrecognizes that the host vehicle has made way for the moving person dueto the notification of the vehicle stoppage information and thus themoving person can take an action of crossing over a road or the likewith an easy mind. In addition, when the approaching vehicle approachingthe moving person to be notified is detected, the out-of-vehiclenotification device does not perform the notification of the vehiclestoppage information with respect to the moving person to be notified.Accordingly, the moving person takes an action while sufficientlychecking the vicinity of the moving person since there is nonotification of the vehicle stoppage information. Therefore, the movingperson can take an action while recognizing the approaching vehicleapproaching the moving person in addition to the host vehicle. Asdescribed above, the out-of-vehicle notification device canappropriately perform notification of information related to thebehavior of the host vehicle in consideration of the presence of anothervehicle.

In the out-of-vehicle notification device, the notification control unitmay be configured to stop the notification of the vehicle stoppageinformation and to cause the notification unit to perform notificationof traveling information, which indicates that the host vehicle willcontinue to travel without being stopped or the host vehicle in astopped state will start to move or indicates that the host vehicle iscontinuing to travel or the host vehicle in a stopped state is startingto move, when the approaching vehicle is detected by the approachingvehicle detecting unit while the notification of the vehicle stoppageinformation is being performed. In this case, the moving person can morereliably recognize that the situation has been changed from a statewhere the host vehicle has made way for the moving person based on thenotification of the traveling information. In addition, moving personcan change an action based on the change of notification. As describedabove, the out-of-vehicle notification device can more reliably notifythe moving person that the situation has been changed.

In the out-of-vehicle notification device, the moving person detectingunit may be configured to detect a moving person expected to cross overa road in front of the host vehicle as the moving person to be notified.In this case, the out-of-vehicle notification device can perform thenotification of the vehicle stoppage information with respect to themoving person expected to cross over the road in front of the hostvehicle.

According to the aspect of the present disclosure, it is possible toappropriately perform notification of information related to thebehavior of a host vehicle in consideration of the presence of anothervehicle.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram illustrating an out-of-vehicle notificationdevice according to an embodiment.

FIG. 2 is a view illustrating a specific example of a situation in whichan out-of-vehicle notification device performs notification.

FIG. 3 is a view illustrating a specific example of a situation in whichthe out-of-vehicle notification device performs notification.

FIG. 4 is a view illustrating a specific example of a situation in whichthe out-of-vehicle notification device performs notification.

FIG. 5 is a flowchart illustrating the flow of a notification processperformed by the out-of-notification device.

DETAILED DESCRIPTION

Hereinafter, an embodiment of the present disclosure will be describedwith reference to drawings. Note that, the same elements will be giventhe same reference numerals in the description of the drawings anddescription thereof will not be repeated.

As shown in FIG. 1, an out-of-vehicle notification device 100 is adevice that is installed in a host vehicle V such as a passenger carthat can be automatically driven, the device notifying a moving personin the vicinity of the host vehicle V of information related to thebehavior of the host vehicle based on a traveling plan while the hostvehicle V is being automatically driven. Automatic driving is vehiclecontrol that causes the host vehicle V to automatically travel along atarget route set in advance. In the case of the automatic driving, adriver does not need to perform a driving operation and the host vehicleV travels automatically. The moving person, who is a target to benotified of information, is a pedestrian in the vicinity of the hostvehicle V, a person on a bicycle, or the like.

The out-of-vehicle notification device 100 is provided with anelectronic control unit (ECU) 10 that controls the entire device, and anexternal sensor 1 and a notification unit 2 which are connected to theECU 10. An automatic driving ECU 3 is further connected to the ECU 10.The ECU 10 is an electronic control unit including a central processingunit (CPU), a read only memory (ROM), a random access memory (RAM), acontroller area network (CAN) communication circuit, and the like.

The ECU 10 is connected to, for example, a network that performscommunication by using the CAN communication circuit and the ECU 10 isconnected such that the ECU 10 can communicate with each component ofthe host vehicle V. That is, the ECU 10 can refer to the result ofdetection performed by the external sensor 1 and the traveling plan ofthe vehicle V which is generated in the automatic driving ECU 3. The ECU10 can output a signal to the notification unit 2.

The ECU 10 loads a program stored in the ROM into the RAM and executesthe program loaded in the RAM with the CPU so as to realizeout-of-vehicle notification functions which will be described later. TheECU 10 may include a plurality of ECUs.

The external sensor (outside situation detecting unit) 1 is a detectingdevice that is installed in the host vehicle V and that detects asituation in the vicinity of the host vehicle V. The external sensor 1includes at least one of a camera and a radar sensor.

The camera is an imaging device that images the outside situation in thevicinity of the host vehicle V. The camera is provided such that thecamera can image the vicinity of the host vehicle V. The cameratransmits imaging information related to the outside situation of thehost vehicle V to the ECU 10. The camera may be a monocular camera andmay be a stereo camera. The stereo camera includes two imaging unitsdisposed such that the binocular parallax is realized. Imaginginformation of the stereo camera includes depth direction informationalso.

The radar sensor is a detecting device that detects an obstacle in thevicinity of the host vehicle V by using a radio wave (for example,millimeter wave) or light. Examples of the radar sensor include amillimeter wave radar and a light detection and ranging (LIDAR). Theradar sensor detects an obstacle by transmitting a radio wave or lightto the vicinity of the host vehicle V and receiving the radio wave orlight reflected by the obstacle. The radar sensor transmits informationabout the detected obstacle to the ECU 10. Examples of the obstacleinclude a moving obstacle such as a pedestrian and a vehicle in additionto a fixed obstacle such as a guardrail and a building.

The notification unit 2 notifies a moving person on the outside of thehost vehicle V of information related to the behavior of the hostvehicle based on control performed by the ECU 10 (notification controlunit 13). In the present embodiment, the notification unit 2 is adisplay device that displays information such that the information canbe visually recognized from a position in front of the host vehicle V.The notification unit 2 is provided on the front surface of the hostvehicle V, for example. The notification unit 2 shows information to themoving person by displaying a character, a picture, or the like.

The automatic driving ECU 3 executes automatic driving of the hostvehicle V. The automatic driving ECU 3 is an electronic control unitincluding a CPU, a ROM, a RAM, a CAN communication circuit, and thelike. The automatic driving ECU 3 is connected to a map data basestoring map information, a position measuring unit that measures theposition of the host vehicle V in a map with a global positioning system(GPS), various actuators for causing the host vehicle V to travel, andvarious sensors including the external sensor 1.

The automatic driving ECU 3 is connected to a network that performscommunication by using, for example, the CAN communication circuit andis connected such that the automatic driving ECU 3 can communicate witheach component of the host vehicle V. That is, the automatic driving ECU3 can refer the map information of the map data base, information aboutthe position of the host vehicle V in the map that is measured by theposition measuring unit, and the result of detection performed by thevarious sensors. The ECU 10 can output signals to the various actuators.

The automatic driving ECU 3 loads a program stored in the ROM into theRAM and executes the program loaded in the RAM with the CPU so as torealize functions of an automatic driving system installed in the hostvehicle V. The automatic driving ECU 3 may include a plurality of ECUs.

The map information of the map data base includes, for example, positioninformation of a road (position information for each lane), informationabout the shape of a road (for example, information about type of curveor straight portion, curvature of curve, or like), information about thewidth of a road (information about width of lane), information about theslope of a road, information about the cant angle of a road, informationabout the speed limit for a road, and information about a road markingsuch as a crosswalk provided on a road. The various actuators include asteering actuator that controls the steering angle of the host vehicleV, a brake actuator that controls a brake system of the host vehicle V,and an engine actuator that controls an engine of the host vehicle V (ormotor of electric car).

The automatic driving ECU 3 searches for a target route from the currentposition of the host vehicle V to a destination based on the mapinformation of the map data base, the information about the position ofthe host vehicle V in the map that is measured by the position measuringunit, and a destination set in advance. The automatic driving ECU 3generates a traveling plan for causing the host vehicle V to travelalong the target route. That is, the automatic driving ECU 3 is providedwith a traveling plan generating unit that generates the traveling plan.The traveling plan includes, for example, a moving route and a movingspeed. The automatic driving ECU 3 generates the traveling plan of thehost vehicle V by using a known method. The automatic driving ECU 3executes automatic driving of the host vehicle V according to thetraveling plan based on the information about the position of the hostvehicle V in the map that is measured by the position measuring unit. Inaddition, the automatic driving ECU 3 transmits the generated travelingplan to the ECU 10. The automatic driving ECU 3 executes the automaticdriving by controlling the host vehicle V by transmitting a controlsignal to the various actuators.

Here, the automatic driving ECU 3 generates the traveling plan accordingto a rule that the moving person is prior to the host vehicle V.Therefore, when there is a moving person who is about to cross over aroad in front of the host vehicle V, the automatic driving ECU 3generates a traveling plan in which the host vehicle V is decelerated orstopped to make way for the moving person expected to cross over theroad and the host vehicle V starts to move after the moving personcrosses over the road. Note that, the automatic driving ECU 3 candetermine whether there is a moving person who is about to cross overthe road in front of the host vehicle V based on the result of detectionperformed by the external sensor 1.

The ECU 10 includes a moving person detecting unit 11, an approachingvehicle detecting unit 12, and the notification control unit 13. Notethat, a portion of the functions of the ECU 10 may be executed by acomputer in a facility such as an information management center that cancommunicate with the host vehicle V and may be executed by a portableinformation terminal that can communicate with the host vehicle V.

The moving person detecting unit 11 detects a moving person in thevicinity of the host vehicle V based on the result of detectionperformed by the external sensor 1. The moving person detecting unit 11can detect the moving person by using a known method based on the resultof detection performed by the external sensor 1.

Furthermore, the moving person detecting unit 11 detects a moving personwho is to be notified of information related to the behavior of the hostvehicle V from among detected moving persons. In the present embodiment,the moving person detecting unit 11 detects a moving person expected tocross over a road in front of the host vehicle V as the moving person tobe notified. The moving person detecting unit 11 can detect the movingperson to be notified by using a known method based on the result ofdetection performed by the external sensor 1. For example, the movingperson detecting unit 11 may determine whether a moving person is themoving person expected to cross over a road (moving person to benotified) or not based on a change in position of the moving person(vector).

The approaching vehicle detecting unit 12 detects an approaching vehiclethat approaches the moving person to be notified who is detected by themoving person detecting unit 11 based on the result of detectionperformed by the external sensor 1. Note that, the approaching vehicleis a vehicle such as an automobile, a motorcycle, a bicycle, or thelike, for example.

Specifically, first, the approaching vehicle detecting unit 12 detectsother vehicles in the vicinity of the host vehicle V based on the resultof detection performed by the external sensor 1. The approaching vehicledetecting unit 12 detects other vehicles present in a predetermined areaaround the host vehicle V as the other vehicles in the vicinity of thehost vehicle V. The approaching vehicle detecting unit 12 can detect theother vehicles by using a known method based on the result of detectionperformed by the external sensor 1.

Next, the approaching vehicle detecting unit 12 determines whether othervehicles other than a preceding vehicle from among the detected othervehicles approach the moving person to be notified or not. Theapproaching vehicle detecting unit 12 detects another vehicleapproaching the moving person to be notified from among the othervehicles other than the preceding vehicle as the approaching vehicle.Note that, the preceding vehicle refers to another vehicle traveling ata position in front of the host vehicle V while being separated from thehost vehicle V by a distance equal to or smaller than a predetermineddistance. That is, examples of the approaching vehicles do not includethe preceding vehicle.

The approaching vehicle detecting unit 12 can determine whether anothervehicle approaches the moving person to be notified or not by using aknown method. For example, the approaching vehicle detecting unit 12 maydetermine whether the other vehicle approaches the moving person to benotified or not by expecting the behavior of the other vehicle based ona change (vector) in position of the detected other vehicle that is madein the past. For example, the approaching vehicle detecting unit 12 maydetermine whether the other vehicle approach the moving person or not byexpecting the movement of the moving person and the movement of theother vehicle. In addition, the expression “approach” used here meansapproach in which a distance between the moving person and the othervehicle becomes equal to or smaller than a predetermined distance.

The notification control unit 13 performs notification of informationrelated to the behavior of the host vehicle by controlling thenotification unit 2. Specifically, when the moving person to be notifiedis detected by the moving person detecting unit 11 and the travelingplan generated in the automatic driving ECU 3 is a traveling plan inwhich the host vehicle V is decelerated or stopped, the notificationcontrol unit 13 causes the notification unit to perform notification ofvehicle stoppage information, which indicates that the host vehicle willbe decelerated or stopped or indicates that the host vehicle is beingdecelerated or stopped, with respect to the moving person to benotified. For example, the notification of the vehicle stoppageinformation may be an operation of displaying letters such as “vehiclewill be decelerated”, “vehicle will be stopped”, “vehicle is beingdecelerated”, “vehicle is being stopped”, or the like on thenotification unit 2. Alternatively, the notification of the vehiclestoppage information may be an operation of displaying an icon or thelike suggesting that the host vehicle V will be decelerated or stoppedor the host vehicle V is being decelerated or stopped on thenotification unit 2. That is, the vehicle stoppage information isinformation including an intention of the host vehicle V to make way forthe moving person.

In addition, even when the moving person to be notified is detected andthe traveling plan is a traveling plan in which the host vehicle V isdecelerated or stopped, the notification control unit 13 does not causethe notification unit 2 to perform notification of the vehicle stoppageinformation if the approaching vehicle is detected by the approachingvehicle detecting unit 12. Note that, the notification control unit 13stops notification of the vehicle stoppage information performed by thenotification unit 2 if the notification of the vehicle stoppageinformation performed by the notification unit 2 is in progress.

Furthermore, when the approaching vehicle is detected by the approachingvehicle detecting unit 12 while the notification of the vehicle stoppageinformation is being performed, the notification control unit 13 stopsthe notification of the vehicle stoppage information and causes thenotification unit 2 to perform notification of traveling information,which indicates that the host vehicle V will continue to travel withoutbeing stopped or the host vehicle V in a stopped state will start tomove or indicates that the host vehicle V is continuing to travel or thehost vehicle V in a stopped state is starting to move. That is, thenotification control unit 13 switches from the notification of thevehicle stoppage information to the notification of the travelinginformation. For example, the notification of the traveling informationmay be an operation of displaying letters such as “vehicle will passwithout being stopped”, “vehicle will start to move”, “vehicle ispassing without being stopped”, “vehicle is starting to move”, or thelike on the notification unit 2. Alternatively, the notification of thetraveling information may be an operation of displaying an icon or thelike suggesting that the host vehicle V will continue to travel withoutbeing stopped, that the host vehicle V in a stopped state will start tomove, that the host vehicle V is passing without being stopped, or thatthe host vehicle V is starting to move on the notification unit 2. Asdescribed above, the traveling information is information including anintention of the host vehicle V not to make way for the moving person.That is, the traveling information is information including an intentionto hold the moving person who is about to cross over a road such thatthe moving person does not cross over the road.

In addition, when the moving person to be notified is detected, thetraveling plan is a traveling plan in which the host vehicle V isdecelerated or stopped, and the approaching vehicle is detected by theapproaching vehicle detecting unit 12, the notification control unit 13causes the notification unit 2 to perform the notification of thetraveling information. That is, the notification control unit 13 alsocan perform the notification of the traveling information from thebeginning although depending on the timing of detection of theapproaching vehicle instead of performing the change from the vehiclestoppage information to the traveling information in the middle of thenotification of the vehicle stoppage information.

Note that, when the preceding vehicle is detected by the approachingvehicle detecting unit 12, the notification control unit 13 does notperform the notification of the vehicle passage information and thetraveling information. That is, the notification control unit 13performs the notification of the vehicle passage information and thetraveling information based on the presence or absence of theapproaching vehicle or the like when there is no preceding vehicle.

In addition, even when the notification control unit 13 performs thenotification of the traveling information due to the presence of theapproaching vehicle, the automatic driving ECU 3 stops the host vehicleV until the moving person crosses over the road.

Next, a specific example of a situation in which the out-of-vehiclenotification device 100 performs notification will be described withreference to FIGS. 2 to 4. Here, the description will be made on anassumption that the moving person is a pedestrian. In an example shownin FIGS. 2 to 4, a pedestrian crossing K is provided on a road R onwhich the host vehicle V travels and a pedestrian P is about to crossover the road R by passing through the pedestrian crossing K. Inaddition, since the pedestrian P is about to pass through the pedestriancrossing K, the automatic driving ECU 3 has stopped the host vehicle Vin front of the pedestrian crossing K. In addition, the notificationcontrol unit 13 is in the middle of the notification of the vehiclestoppage information which is notification indicating an intention tomake way for the pedestrian P.

An example shown in FIG. 2 is related to a case where a motorcycle Bapproaches the pedestrian P from a position behind the host vehicle V asseen from the pedestrian P. That is, the motorcycle B is the approachingvehicle approaching the pedestrian P. When the out-of-vehiclenotification device 100 performs the notification of the vehiclestoppage information in this situation, the pedestrian P may recognizethat the host vehicle V has made way for the pedestrian P and may try topass through the pedestrian crossing K without sufficiently checking thesituation around the pedestrian P. Therefore, when the motorcycle Bapproaching the pedestrian P from a position behind the host vehicle Vis detected by the external sensor 1, the out-of-vehicle notificationdevice 100 notifies the pedestrian P of the notification of thetraveling information so as to hold the pedestrian P such that thepedestrian P does not pass through the pedestrian crossing K. That is,when the motorcycle B is detected, the out-of-vehicle notificationdevice 100 stops the notification of the vehicle stoppage informationand performs the notification of the traveling information.

An example shown in FIG. 3 is related to a case where another vehicle V1that travels on an opposing lane at a position in front of the hostvehicle V approaches the pedestrian P. That is, the other vehicle V1 isthe approaching vehicle approaching the pedestrian P. In this situation,the pedestrian P can easily visually recognize the other vehicle V1 incomparison with a case where the motorcycle B approaches the pedestrianP from a position behind the host vehicle V as shown in FIG. 2. However,when the out-of-vehicle notification device 100 performs thenotification of the vehicle stoppage information, the pedestrian P maytry to pass through the pedestrian crossing K without sufficientlychecking the situation around the pedestrian P. Therefore, when theother vehicle V1 approaching the pedestrian P is detected by theexternal sensor 1, the out-of-vehicle notification device 100 notifiesthe pedestrian P of the notification of the traveling information so asto hold the pedestrian P such that the pedestrian P does not passthrough the pedestrian crossing K. That is, when the other vehicle V1 isdetected, the out-of-vehicle notification device 100 stops thenotification of the vehicle stoppage information and performs thenotification of the traveling information.

An example shown in FIG. 4 is related to a case where the other vehicleV1 that is in front of and to the right of the host vehicle V turns leftand approaches the pedestrian P. That is, the other vehicle V1 is theapproaching vehicle approaching the pedestrian P. In this situation, thepedestrian P can easily visually recognize the other vehicle V1 sincethe other vehicle V1 is present in front of the pedestrian P. However,when the out-of-vehicle notification device 100 performs thenotification of the vehicle stoppage information, the pedestrian P maytry to pass through the pedestrian crossing K without sufficientlychecking the situation around the pedestrian P. Therefore, when theother vehicle V1 approaching the pedestrian P from a position that is infront of and to the right of the host vehicle V is detected by theexternal sensor 1, the out-of-vehicle notification device 100 notifiesthe pedestrian P of the notification of the traveling information so asto hold the pedestrian P such that the pedestrian P does not passthrough the pedestrian crossing K. That is, when the other vehicle V1 isdetected, the out-of-vehicle notification device 100 stops thenotification of the vehicle stoppage information and performs thenotification of the traveling information.

Next, the flow of a notification process performed by the out-of-vehiclenotification device 100 will be described by using a flowchart in FIG.5. Note that, the process shown in FIG. 5 is restarted from the startwhen a predetermined time elapses after the process reaches the end. Inaddition, the process shown in FIG. 5 is executed while the host vehicleV is being automatically driven.

As shown in FIG. 5, the moving person detecting unit 11 detects a movingperson in the vicinity of the host vehicle V based on the result ofdetection performed by the external sensor 1 (S101). The moving persondetecting unit 11 determines whether there is a moving person to benotified who is about to cross over a road in front of the host vehicleV based on the result of the detection performed by the external sensor1 (S102). When there is no moving person to be notified (S102: NO), theout-of-vehicle notification device 100 terminates the current processand restarts the process from the start after the predetermined timeelapses.

When there is a moving person to be notified (S102: YES), theapproaching vehicle detecting unit 12 detects another vehicle in thevicinity of the host vehicle V (S103). The approaching vehicle detectingunit 12 determines whether there is a preceding vehicle (S104). Whenthere is a preceding vehicle (S104: NO), the out-of-vehicle notificationdevice 100 terminates the current process and restarts the process fromthe start after the predetermined time elapses.

When there is no preceding vehicle (S104: YES), the notification controlunit 13 determines whether the traveling plan generated by the automaticdriving ECU 3 is a traveling plan in which the host vehicle V isdecelerated or stopped or not (S105). That is, the notification controlunit 13 determines whether the traveling plan is a traveling plan ofmaking way for the pedestrian expected to cross over a road. When thetraveling plan is not a traveling plan in which the host vehicle V isdecelerated or stopped, (S105: NO), the out-of-vehicle notificationdevice 100 terminates the current process and restarts the process fromthe start after the predetermined time elapses.

When the traveling plan is a traveling plan in which the host vehicle Vis decelerated or stopped (S105: YES), the approaching vehicle detectingunit 12 determines whether there is another vehicle other than thepreceding vehicle (S106). When there is no other vehicle other than thepreceding vehicle (S106: NO), the notification control unit 13 causesthe notification unit 2 to perform the notification of the vehiclestoppage information (S110).

When there is another vehicle other than the preceding vehicle (S106:YES), the approaching vehicle detecting unit 12 performs a process ofdetecting whether the other vehicle other than the preceding vehicleapproaches the moving person to be notified (S107). When there is anapproaching vehicle approaching the moving person to be notified (S108:YES), the notification control unit 13 causes the notification unit 2 toperform the notification of the traveling information (S109). Note that,if the notification unit 2 is caused to perform the notification of thevehicle stoppage information in a preceding process, the notificationcontrol unit 13 stops the notification of the vehicle stoppageinformation and causes the notification unit 2 to perform thenotification of the traveling information when performing the process inS109. That is, the notification control unit 13 switches from thenotification of the vehicle stoppage information to the notification ofthe traveling information.

Meanwhile, when there is no approaching vehicle approaching the movingperson to be notified (S108: NO), the notification control unit 13causes the notification unit 2 to perform the notification of thevehicle stoppage information (S110).

As described above, when an approaching vehicle approaching the movingperson to be notified is not detected, the out-of-vehicle notificationdevice 100 performs notification of the vehicle stoppage informationwith respect to the moving person to be notified. Accordingly, themoving person recognizes that the host vehicle V has made way for themoving person due to the notification of the vehicle stoppageinformation and thus the moving person can take an action of crossingover a road or the like with an easy mind. In addition, when anapproaching vehicle approaching the moving person to be notified isdetected, the out-of-vehicle notification device 100 does not performthe notification of the vehicle stoppage information with respect to themoving person to be notified. Accordingly, the moving person takes anaction while sufficiently checking the vicinity of the moving personsince there is no notification of the vehicle stoppage information.Therefore, the moving person can take an action while recognizing theapproaching vehicle approaching the moving person in addition to thehost vehicle V. As described above, the out-of-vehicle notificationdevice 100 can appropriately perform notification of information relatedto the behavior of the host vehicle V in consideration of the presenceof another vehicle.

When an approaching vehicle approaching the moving person is detectedwhile the notification of the vehicle stoppage information is beingperformed, the out-of-vehicle notification device 100 stops thenotification of the vehicle stoppage information and causes thenotification unit 2 to perform the notification of the travelinginformation. In this case, the moving person can more reliably recognizethat the situation has been changed from a state where the host vehicleV has made way for the moving person due to the switch from thenotification of the vehicle stoppage information to the notification ofthe traveling information. In addition, the moving person can change anaction based on the change of notification. As described above, theout-of-vehicle notification device 100 can more reliably notify themoving person that the situation has been changed.

The moving person detecting unit 11 detects a moving person expected tocross over a road in front of the host vehicle V as the moving person tobe notified. In this case, the out-of-vehicle notification device 100can perform the notification of the vehicle stoppage information withrespect to the moving person expected to cross over the road in front ofthe host vehicle V.

Hereinabove, the embodiment of the present disclosure has beendescribed. However, the present disclosure is not limited to theabove-described embodiment. For example, the notification unit 2 may bea speaker that outputs sound. The notification control unit 13 mayperform the notification of the vehicle stoppage information and thetraveling information by outputting a voice such as “vehicle will bestopped” and “vehicle will start to move”, a buzzer sound, or the likefrom the notification unit 2. In addition, the notification unit 2 maybe a mobile device carried by the moving person. For example, thenotification control unit 13 may perform the notification of the vehiclestoppage information and the traveling information by causing avibration generating unit of the mobile device carried by the movingperson to vibrate. In addition, the notification control unit 13 mayperform the notification of the vehicle stoppage information and thetraveling information by using a change in behavior of the host vehicleV.

Note that, the out-of-vehicle notification device 100 may perform thenotification of the vehicle stoppage information only without performingthe notification of the traveling information. In addition, the movingperson detecting unit 11 may detect a moving person other than a movingperson expected to cross over a road in front of the host vehicle V asthe moving person to be notified. For example, the moving persondetecting unit 11 may detect a moving person moving in a predeterminedarea around the host vehicle V as the moving person to be notified. Forexample, the approaching vehicle detecting unit 12 may detect anothervehicle traveling in a predetermined area from the moving person to benotified as an approaching vehicle.

What is claimed is:
 1. An out-of-vehicle notification device whichnotifies a moving person in a vicinity of a host vehicle of informationrelated to a behavior of the host vehicle based on a traveling plan ofautomatic driving while the host vehicle is being automatically driven,the device comprising: an outside situation detecting unit configured todetect a situation in the vicinity of the host vehicle; a moving persondetecting unit configured to detect the moving person who is to benotified of the information related to the behavior of the host vehiclebased on a result of detection performed by the outside situationdetecting unit; an approaching vehicle detecting unit configured todetect an approaching vehicle approaching the moving person to benotified who is detected by the moving person detecting unit based onthe result of detection performed by the outside situation detectingunit; a notification unit configured to perform notification ofinformation with respect to an outside of the host vehicle; and anotification control unit configured to cause the notification unit toperform notification of vehicle stoppage information, which indicatesthat the host vehicle will be decelerated or stopped or indicates thatthe host vehicle is being decelerated or stopped, with respect to themoving person to be notified when the moving person to be notified isdetected by the moving person detecting unit and the traveling plan is atraveling plan in which the host vehicle is decelerated or stopped,wherein the notification control unit is configured not to cause thenotification unit to perform the notification of the vehicle stoppageinformation when the approaching vehicle is detected by the approachingvehicle detecting unit.
 2. The out-of-vehicle notification deviceaccording to claim 1, wherein the notification control unit isconfigured to stop the notification of the vehicle stoppage informationand to cause the notification unit to perform notification of travelinginformation, which indicates that the host vehicle will continue totravel without being stopped or the host vehicle in a stopped state willstart to move or indicates that the host vehicle is continuing to travelor the host vehicle in a stopped state is starting to move, when theapproaching vehicle is detected by the approaching vehicle detectingunit while the notification of the vehicle stoppage information is beingperformed.
 3. The out-of-vehicle notification device according to claim1, wherein the moving person detecting unit is configured to detect amoving person expected to cross over a road in front of the host vehicleas the moving person to be notified.